Cita APA (7th ed.)

Palmer, F. R. (1988). The english verb (2a. ed.). Longman.

Cita Chicago (17th ed.)

Palmer, Frank Robert. The English Verb. 2a. ed. Londres: Longman, 1988.

Cita MLA (9th ed.)

Palmer, Frank Robert. The English Verb. 2a. ed. Longman, 1988.